Connect finitude, wonder, and ordinary care to Existential Euphoria

[raelovejoy]

Rae explicitly identified BHIG as an intersection with Existential Euphoria. The existing Finitude, Love, and Continuance essay already explores a nearby question, so this PR adds a small connection there rather than another essay.

Changes:

• Add a clearly dated, provisional, AI-assisted “Wonder and ordinary care” section to src/pages/core/finitude-love-continuance.md.
• Use illustrative everyday situations, explicitly not personal testimony.
• Ask what follows from wonder in listening, support, refusal, and rest; leave room for fear, grief, boundaries, and different responses to finitude.
• Add one README relationship/navigation bullet linking the existing essay and canonical Existential Euphoria repo.

Validation:

• git diff --check passed.
• Compared the essay before/after: all original wording and YAML front matter are unchanged.
• Verified the README's local essay target and the live canonical ROOT-SEQUENCE.md source.
• Text-only change; Astro build not run. No new route, dependency, configuration, or front matter field.

This connects the existing work without making euphoria an emotional obligation or the new framework a BHIG rulebook. The main unresolved question is whether this practical interpretation feels faithful to Rae's intended connection.

Leave open for author review; no merge or deployment is requested.